Originally Posted by
thatguyyouknow
what is the difference between a bec and a power cap they look very similar and i am not shure which to get. all i need it to do is supply power to a high voltage servo and the castle bec sucks
Which Castle ESC do you have? If just a Sidewinder version, then you cant adjust the BEC voltage.
If you need to power a HV servo to 7.4V, then you need an external BEC. A capacitor that plugs into your receiver would help with brownouts caused by low voltage to the servo but wont increase the output like an external BEC.
Castle makes one that you wire in, and its adjustable via Castle Link.